I use iPhoto 11, and I'd like to backup the library, along with all the photos.
I'd ideally like a continuous backup, by putting the iPhoto Library.photolibrary file / package in Dropbox. But I'm concerned that Dropbox may not preserve everything HFS+ provides, such as:
Symlinks, hard links and aliases.
Resource forks and extended attributes.
File modification times. Imagine if iPhoto expects the library to have two files with one of them always having a modification time always older than the other's. When the files are synced to the cloud, and synced back to another device, does Dropbox guarantee to preserve the relative order of the modification times? If not, if I lose my Mac and buy a new one, the iPhoto library may be corrupt and unreadable (or things may appear to work but go wrong later).
Dropbox may have path length limits or may disallow certain characters in file names, etc.
I could not find any definitive documentation from either Dropbox or Apple about this.
Assuming that my reasoning above is correct -- that it's not safe to put my iPhoto Library in Dropbox -- that means that I can't have continuous backup.
In that case, I must do periodic backups, and hope nothing goes wrong in the meanwhile. Is it safe to backup the iPhoto library to a FAT32 filesystem?
I found http://support.apple.com/kb/TS5168 but it says only that I shouldn't run iPhoto with the library stored on a FAT32 disk, not that I shouldn't back it up to a FAT32 disk.
I also found http://support.apple.com/kb/ph2504 , which encourages us to back up to an external disk, but doesn't say if FAT32 is okay.